chore: add yoshi-automation account to members.json (#1649)

Author: meltsufin

google-auth-library-java/.github/workflows/members.json

@@ -5,6 +5,7 @@
 {"login":"gcf-owl-bot[bot]"},
 {"login":"dependabot[bot]"},
 {"login":"yoshi-code-bot"},
+{"login":"yoshi-automation"},
 {"login":"suztomo"},
 {"login":"dangazineu"},
 {"login":"ldetmer"},